"Wait a minute!" declares the Torah, "don't forget that it is HaShem who brings you success. You must show HaShem your appreciation!"

A Jew is commanded to set aside one tenth of his herds and flocks and offer them as sacrifices to HaShem who blesses his possessions.

Man, on his own, cannot reach higher than his own ego. He cannot break out of his own skin, he cannot lift himself up by pulling at his own hair. All of his achievements are tied to his own ego. All that he may comprehend is defined by his own subjective perception. He is a prisoner by virtue of existence. So G-d threw Man a rope. He gave him tasks to fulfill that are beyond his comprehension, thoughts to fathom that take him outside the hollow of his subjective universe. All that is needed is his willingness to leave himself. We are all prisoners. But we sit on the keys.